Ecological Network Analysis for Water Pollution Metabolism in Urban Water Use System: Case Study of Fuzhou, China

Abstract

Water environment deterioration in urban environments is a critical concern in sustainable water management processes, and the method of urban water metabolism has not been developed more fully in this field. Therefore, there is a requirement to evaluate urban water metabolism with a focus on water quality for sustainable water use. In this study, information and network environ analyses in ecological network analysis (ENA) were explored to measure the water pollutant metabolism state. Six sub-basins in the old part of Fuzhou in China using data from 2016 and 2019 were selected for the case study. Results showed that (1) water pollutant metabolism amount decreased and the metabolism efficiency was improved; (2) the contribution of sub-basins III and IV for pollutant metabolism were more important than the other sub-basins; (3) the river in sub-basin III was the maximum recipient control as a sink node; and (4) ecological relations between compartments were improved for pollutant metabolism. Based on the results, we proposed five types of ENA indicators including TST, a, wj, matrix CX, matrix sgnU, and C for the water pollutant metabolism assessment. The method developed here provided new insights to understand the production, transport, degradation, and discharge of pollutants in water use activities in urban environments, and we hope it can be helpful to improve the extension and application of the water metabolism approach in managing urban water quantity and quality in future.

Ecological Network Construction of Putian Rural Landscape Based on Geospatial Analysis

“…i V -the value of organic matter production by the vegetation of the i nd ecological type (yuan), i Athe annual net production of vegetation of the i th ecological type dry weight, B -the quality coefficient of coal, standard coal 1 B = . P -the market price of standard coal (take 345.5 dollars), 1 Q -heavy biomass discounted calories, 1 6.7…”

“…As an important carrier of economic and social development and production and life, the countryside has a certain complexity and comprehensiveness [1][2][3]. Since the reform and opening up, the urbanization process has been accelerating, and the traditional rural society, economy, culture, and ecology have been subjected to great impacts [4][5][6]. The continuous construction of human activities has aggravated the empty land waste and environmental pollution in the countryside, which in turn leads to environmental problems such as fragmentation of biological habitats and reduction of landscape connectivity, and the contradiction between ecological construction and economic development is becoming more and more prominent [7][8][9].…”

Material flow analysis and characteristics of multiple-source organic solid wastes from a perspective of ecological network analysis: A case study in Hefei, China

“…The ecological network model can achieve this goal perfectly ( Zhang et al, 2014 ). Matrix operations were used in ecological network analysis (ENA) to transform ecosystems into nodes, paths and flows in a network, and analyse the flows of materials and energy within the system ( Gao et al, 2021 ; Xu et al, 2021 ). Applying ENA to urban ecosystems, the interrelationship of nodes within the system can be analysed to facilitate the regulation and management of urban systems ( Schandl et al, 2020 ; Zhai et al, 2019 ).…”